Delete perf tests that are WontFixed.

LayoutTests/perf/class-list-remove.html

-<script src="../resources/magnitude-perf.js"></script>
-<script>
-
-var element, className, classToRemove;
-
-// Test 1 tests that remove is linear when there are N class names.
-
-function setupFunction1(magnitude)
-{
-    element = document.createElement('div');
-    classToRemove = 'b';
-    className = Array(magnitude).join('a ') + classToRemove;
-}
-
-// Test 2 tests that remove is linear when the length of the class name is N.
-
-function setupFunction2(magnitude)
-{
-    element = document.createElement('div');
-    classToRemove = Array(magnitude + 1).join('a');
-    className = classToRemove;
-}
-
-function test(magnitude)
-{
-    element.className = className;
-    element.classList.remove(classToRemove);
-}
-
-Magnitude.description('Tests that classList remove is linear, ' +
-                      'both in number of class names ' +
-                      'and in length of class name.');
-Magnitude.numTrials = 5;
-Magnitude.successThreshold = 0.40; // 2 out of 5
-Magnitude.tolerance = 0.35;
-Magnitude.trim = 1;
-
-Magnitude.initialExponent = 9;
-Magnitude.numPoints = 5;
-Magnitude.run(setupFunction1, test, Magnitude.LINEAR);
-Magnitude.initialExponent = 12;
-Magnitude.numPoints = 5;
-Magnitude.run(setupFunction2, test, Magnitude.LINEAR);
-
-</script>
-</body>